What is Faraday's Law of Induction?
Faraday's Law of Induction is a fundamental principle in electromagnetism that states that a change in the magnetic environment of a coil of wire will induce an electromotive force (EMF), or voltage, in that coil. In simpler terms, it describes how a changing magnetic field creates an electric current.
Section 2: The Core Principle
The law specifies that the magnitude of the induced EMF is directly proportional to the rate of change of the magnetic flux through the circuit. Magnetic flux is the measure of the total magnetic field lines passing through a given area. The faster the magnetic flux changes, the greater the induced voltage and resulting current.
Section 3: A Practical Example
A common example of Faraday's Law in action is an electric generator. In a generator, a coil of wire is rotated within a magnetic field. This continuous rotation constantly changes the magnetic flux passing through the coil, which induces a steady alternating current (AC). This is the primary way electricity is generated in power plants.
Section 4: Why Is Faraday's Law Important?
Faraday's Law is crucial to modern technology as it forms the basis for electric generators, transformers, induction motors, and wireless charging pads. It established the link between magnetism and electricity, paving the way for the generation, transmission, and use of electrical power on a global scale.